NCERT MCQ Solutions for Class 8 Science Curiosity Chapter 10 Light: Mirrors and Lenses

Concave mirrors reflect and converge light to a point, allowing the beam to travel a long distance. Their use in torches and vehicle headlights because they focus light effectively in one direction, enhancing visibility during night driving.

Convex mirrors form diminished and erect images. They cover a wide field of view, making them suitable for observing traffic behind. Convex mirrors help drivers see more of the road behind, preventing accidents.

A convex lens is thicker at the center and bends incoming parallel rays inward to a point. It as a converging lens. It is used in magnifying glasses, cameras and the human eye to focus light.

Convex mirrors form erect images that are smaller than the object. These properties are consistent regardless of the object’s distance, making them useful for wide-view mirrors in vehicles and public places.

When an object is placed close to a concave mirror, the image appears larger and upright. It is demonstrates this through activities and mentions its practical use in dental mirrors for viewing enlarged images inside the mouth.

As the distance between the object and concave mirror increases, the image changes from being erect and enlarged to inverted and smaller. This variation is unique to concave mirrors and is used in telescopic designs.

A plane mirror reflects light without distorting size. It always produces an image that is erect, virtual and the same size as the object, though laterally inverted. It’s commonly used in daily life.

The concave lens is thinner at the center and causes parallel rays of light to spread out. It as a diverging lens. It is used in glasses for people with myopia to correct their vision.

No matter the distance of the object, a concave lens always forms an image that is upright and smaller than the object. This consistent behavior and explains its application in correcting nearsightedness.

A magnifying glass uses a convex lens to enlarge the appearance of small text or objects. It is demonstrates how placing a convex lens close to an object can produce an erect and enlarged image, useful for reading fine print.

A real image is one that can be formed on a screen because the reflected or refracted rays actually meet at a point. Real images are always inverted and can be obtained using concave mirrors or convex lenses under certain conditions.

Light reflects from smooth surfaces like mirrors in a predictable manner. It obeys the law of reflection, where the angle of incidence is equal to the angle of reflection, and both rays lie in the same plane.

Concave mirrors form enlarged, upright images when the object is placed close to the mirror.
Dentists use them to see a magnified view of teeth and gums for better diagnosis.

Nearsighted people have difficulty seeing distant objects clearly.
A concave lens diverges the incoming light rays before they enter the eye, helping them focus on the retina. The chapter explains its role in vision correction.

Concave mirrors create enlarged, upright images when used close to the object. This is useful in shaving mirrors, where a person needs a magnified and clear image of their face.

A convex mirror has a reflecting surface that bulges outward.
Such mirrors diverge light rays and form smaller, upright images, making them suitable for wide-angle viewing applications like vehicle mirrors.

A plane mirror forms a virtual image, meaning the light rays do not actually meet. The image appears upright and is located behind the mirror.
It is also the same size as the object and laterally inverted.

A convex lens bends incoming parallel rays so that they meet at a point on the other side. This is why it is called a converging lens.
Illustrates this property through ray diagrams and practical uses like in magnifying glasses.

Regular reflection as occurring on smooth and shiny surfaces like mirrors.
These surfaces reflect light uniformly, producing clear images. In contrast, rough surfaces scatter light, causing diffused reflection.

A concave lens always causes incoming light rays to diverge. Because the rays do not meet on the other side, no real image is formed. Concave lenses always form virtual, erect and diminished images.

Convex lenses are used in magnifying glasses. These lenses converge light to produce a larger image of an object placed close to them, making small text or images easier to see.

When an object is placed far from a convex lens, the rays converge on the other side to form a real image.
Such images are inverted and smaller than the object at larger distances.

The concept of refraction. When light passes from one medium to another like air to water, it bends due to a change in speed. This bending of light is called refraction.

Lateral inversion is the phenomenon where the left side of the object appears as the right side in the image and vice versa. This happens in images formed by plane mirrors.

Convex mirrors diverge light rays due to their outward-curved surface. This creates a wide field of view.
The reason convex mirrors are used in vehicles and hallways to observe a larger area.

Virtual images are those that cannot be projected onto a screen because the light rays do not actually meet.
Such images only appear to be formed behind mirrors or lenses.

The chapter describes concave lenses as thinner in the middle and thicker at the edges. This shape causes light to spread out or diverge.
Such lenses are used to correct nearsightedness.

The primary function of mirrors is to reflect light. Whether plane, concave or convex, all mirrors obey the law of reflection.
Focuses on how different shapes change the nature of the reflected image.

Concave mirrors can form both real and virtual images depending on the object’s position.
Real images are formed when the object is far, and virtual images are formed when the object is close to the mirror.

Diffused reflection as the scattering of light in different directions due to an uneven surface.
Unlike smooth mirrors, rough surfaces like paper or cloth reflect light irregularly, causing no clear image to form.